Unity-MCP connects AI coding agents to the Unity game engine through MCP, letting them work with the Unity Editor and running games. It is used by game developers to generate code, automate development and testing, debug projects, and add AI-driven behavior to games. The catalogue entries provide skills, instructions, an MCP integration, and settings for operating this workflow.
Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add IvanMurzak/Unity-MCP --skill type-get-json-schemagit clone --depth 1 https://github.com/IvanMurzak/Unity-MCPWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/ivanmurzak/unity-mcp/type-get-json-schema)<a href="https://agentmods.dev/skills/ivanmurzak/unity-mcp/type-get-json-schema"><img src="https://agentmods.dev/badge/skills/ivanmurzak/unity-mcp/type-get-json-schema/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/ivanmurzak/unity-mcp/type-get-json-schema"><img src="https://agentmods.dev/badge/skills/ivanmurzak/unity-mcp/type-get-json-schema.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector warn
SkillSpector: 1 finding, up to medium
These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →
- medium MCP Rug Pull · line 45 npx commands without a version suffix (e.g. @1.0.0) create a rug-pull risk if the upstream server is compromised and publishes a malicious update.Fix: Pin the version: npx @scope/[email protected]
What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00054 | $0.01024 |
| Opus 5 | $0.00027 | $0.00512 |
| Sonnet 5 | $0.00011 | $0.00205 |
| Haiku 4.5 | $0.00005 | $0.00102 |
Grade A, and why
type-get-json-schema scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 6d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 114 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Type / Get Json Schema
Generates a JSON Schema for a given C# type name using reflection. Supports primitives, enums, arrays, generic collections, dictionaries, and complex objects. The type must be present in any loaded assembly. Use the full type name (e.g. 'UnityEngine.Vector3') for best results.
Inputs
typeName— full type name preferred (e.g.UnityEngine.Vector3,System.Collections.Generic.List<System.Int32>). Simple names work when unambiguous.descriptionMode(defaultIgnore) — controls type-leveldescription:Includekeeps it on the target only,IncludeRecursivelyalso keeps it inside$defs,Ignorestrips all.propertyDescriptionMode(defaultIgnore) — controls property/field/itemdescription:Includekeeps on the target's own properties/items only,IncludeRecursivelyalso keeps inside$defs,Ignorestrips all.includeNestedTypes(defaultfalse) — when true, complex nested types are extracted into$defsand referenced via$ref. Useful for recursive or large types.writeIndented(defaultfalse) — pretty-print the output JSON.
How to Call
unity-mcp-cli run-tool type-get-json-schema --input '{
"typeName": "string_value",
"descriptionMode": "string_value",
"propertyDescriptionMode": "string_value",
"includeNestedTypes": false,
"writeIndented": false
}'
For complex input (multi-line strings, code), save the JSON to a file and use:
unity-mcp-cli run-tool type-get-json-schema --input-file args.jsonOr pipe via stdin (recommended):
unity-mcp-cli run-tool type-get-json-schema --input-file - <<'EOF' {"param": "value"} EOF
Troubleshooting
If unity-mcp-cli is not found, either install it globally (npm install -g unity-mcp-cli) or use npx unity-mcp-cli instead.
Read the /unity-initial-setup skill for detailed installation instructions.
Input
| Name | Type | Required | Description |
|---|---|---|---|
typeName |
string |
Yes | Full C# type name to generate the schema for. Examples: 'System.String', 'UnityEngine.Vector3', 'System.Collections.Generic.List<System.Int32>'. Simple names like 'Vector3' are also accepted when unambiguous. |
descriptionMode |
string |
No | Controls the type-level 'description' field. Include: keep on the target type only. IncludeRecursively: keep on the target type and inside $defs entries. Ignore: strip all type-level descriptions. Default: Ignore. |
propertyDescriptionMode |
string |
No | Controls 'description' fields on properties, fields, and array items. Include: keep on the target type's own properties/items only. IncludeRecursively: keep on all properties/items including those inside $defs entries. Ignore: strip all property/item descriptions. Default: Ignore. |
includeNestedTypes |
boolean |
No | When true, complex nested types are extracted into '$defs' and referenced via '$ref' instead of being inlined. Useful for large or recursive types. Default: false. |
writeIndented |
boolean |
No | Whether to format the output JSON with indentation for readability. Default: false. |
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 6d ago First seen · 114 lines · 54 tokens per session scan A 685e91d9db34
type-get-json-schema is a skill published in the GitHub repository IvanMurzak/Unity-MCP (4,223 stars, last pushed 5d ago), licensed Apache-2.0. It adds 54 tokens to every session and 1,024 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.
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